Hoist



F. G. WELKE May 9, 1939.

HOIST Filed March 20, 1956l Patented May 9, 1939 UNITED STATES PATENTOFFICE HOIST Application March 20, 1936, Serial No. 69,790

1 Claim.

This invention is concerned with a jack for raising the weight of thebody of an automobile or other vehicle from its axles.

It is a present practice in order to thoroughly 5 lubricate the springsand associated members of an automobile truck or like vehicle, to removethe weight of the body from the springs. By this procedure, as will beapparent, it is possible for the grease or oil to penetrate into thespring shackles and between the leaves of the leaf springs with whichsuch vehicles are generally provided. A usual practice is to raise thebody of the automobile by means of a jack, the base of which rests uponthe ground or upon a cross member of an automobile elevator or hoistupon which the vehicle may be driven in order that the chassis may bemade more accessible. These jacks present a disadvantage in that aslight movement of the vehicle upon the hoist or other base upon whichthe vehicle is resting will cause the body to be dislodged from the endof the jack with possible injury to the man working under the vehicle.Another disadvantage of such jacks is that they are, of necessity,relatively heavy. It is therefore, an object of this invention to devisea jack for raising the body and frame of a vehicle from its axles whichwill avoid the above disadvantages.

It is another object of this invention to provide a jack which willraise the body of the Vehicle from its chassis without taking any weight01T the wheels of the vehicle.

The further objects of my invention will be apparent to those skilled inthe art from the following detailed description of a specic embodimentof my invention throughout which reference is made to the accompanyingdrawing of which: Figure l is a partial sectional elevation of thehoist. Figure 2 is a view showing the hoist in use upon an automobile,only part of which is shown. Figure 3 is an end view of the hoist withchain removed.

Referring to Figures 1 and 3, the body of the hoist comprises a squaretube I having securely mounted on one exterior face and towards one enda hooked arm 2. Slidably mounted in the bore of the square tube I is asquare threaded nut 3 having attached toits upper side one end of around tube 4 which tube is also slidably mounted in the bore of saidsquare tube I. The free end 5 of the tube 4 is knurled and hardened, theobject of which will appear later herein. A jack screw 6 is threadedinto the nut 3. The end of the jack screw towards the hook 2 is providedwith a shoulder 1. Upon the side of the shoulder opposite thescrew-threaded portion of the jack screw, a rod 8 extends whichterminates in a T-handle 9, having a crank Ill at one end. The shoulder'I abuts against a. thrust washer I I, held in place by a thrust sleeveI2.

A flexible metallic member such as a chain I3 5 provided with a squareshaped link I4 at one end forms part of the jack. The square shaped linkI4 is of such size that it can slide upon the square tube I. The hookarm 2 is provided with a slot I5 so that adjustment of the length ofchain be- 10 tween the square link I4 and the hook 2 can be readilymade.

The hoist is used as follows: Referring to Figure 2, the chain I3 isfirst placed aro-und the axle I6 and the free end pulled tight and alink passed 15 into the slot I5 of the hook 2. The handle 9 of the hoistis then turned and the upper knurled end 5 of tube 4 directed to contacta rivet or other suitable surface on the frame I'I or associated part ofthe vehicle. Continued turning of the 20 handle will remove the weightof the frame and body from the springs I8 and the shackles I9,transferring the same directly to the axle IB so that lubricant can morereadilybe placed between the leaves of the spring and reach the normallead carrying surfaces of the shackles. As will be apparent to thoseskilled in the art the hoist readily adapts itself to use on all typesof vehicles, which has not been the case with previous hoists operatingbetween an axle and the 30 frame and body. Furthermore, a particularadvantage of my device is that it is safer than existing jacks. Thechain I3 securely holds the jack to the axle and the pressure on theknurled head prevents the upper end of the device sliding ofi the frame.An incidental advantage is that the hoist is far less expensive thanknown devices.

Whereas in this specification I have described a preferred form of mydevice it should be understood that I may make modifications thereof 40within the scope of the claim appended hereto.

I claim as my invention:

An automobile hoist comprising a jack screw,

a tubular member mounted thereon said tubular member having a serratedcontact surface at its 45 upper end, a casing of rectangular crosssection for said jack screw, a chain for attaching said casing to anaxle of an automobile, one end link of said chain being adapted to passover the upper end of said tubular member and to slide on said 50rectangular shaped casing, jaws mounted o-n the lower end of said casingadapted to receive the other end of said chain, and a. crank arm mountedon the lower end of said jack screw substantially as described. 55

FERDINAND G. WELKE.

